Josiah wade



(No Model.)

J. WADE.

BORING TOOL.

No. 280,420. Patented July 3, 1883.

no.1. F103 FIG. 6. flO-. 5.

no. 9. 1/ 51 no.

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UNITED STATES PATENT 7 OFFICE.

JOSIAH VADE, OF HALIFAX, COUNTY OF YORK, ENGLAND.

\ BORING-TOOL.

SPECIFICATION forming part of Letters Patent No. 280,420, dated July 3,1883.

Application filed May 2,1883. (No model.) Patented in England March 30,1883, No. 1,603.

To all whom it may concern Be it known that I, JOSIAH WADE, a citizen ofGreat Britain, residing at Halifax, in the county of York, England, haveinvented certain Improvements in Cutters for Boring-Ma chines, of whichthe following is a specification.

My invention relates to improvements in boring-bars; and'the inventionconsists in providing the bar with two cutters arranged in a cross slotor aperture in the bar, so as to proj ect beyond its periphery, and withmeans for uniformly regulating the projection of said cutters beyondthe-bar, so that holes of different diameters may be bored at will, andfor clamping the cutters fast, all as will be hereinafter more fully setforth.

In the drawings which serve to illustrate my invention, Figure 1 is aside view of a boring-bar provided with my improvements. Fig. 2 is alongitudinal vertical mid-section of same. Fig. 3 is a cross-section online 3 3 in Fig. 1. Fig. 3 shows the adjusting or setting screwdetached, and Fig. 4 is a crosssection on line 4 4 in Fig. 1. Figs. 5,6, 7, 8, and 9 illustrate modifications which will be referred tohereinafter.

Referring to the first four figures, A repre sents the boring-bar,provided with a fixed collar, B, a male screw, (1, and a diametricalcross slot or mortise to receive the cutters D lg]. These cutters may bemade from tool-steel in any way but I prefer to make them in one piece,then drill a hole through the center, ream it out to a conical form, andthen cut the piece in two by a cross-cut thro ugh the center of saidhole. The reason for this will be made clear hereinafter.

G is a loose collar, which slips over the bar, and H is a nut. Byscrewing up this nut the collar G is forced against the cutters, andthey in turn against the fixed collar B, whereby the cutters are firmlyclamped and held. To further steady their lateral edges, however, Irecess the inner faces of the collars B and G, to receive said edges ofthe cutters, as clearly shown, especially in Fig. 1.

I is a setting or adjusting screw, which has a conical portion, 6, (seeFig. 3,) that engages the conical hole before referred to, one-half ofwhich is in each of the juxtaposed butts of the cutters D E. By screwingin the screw I the cutters will be driven outward, as will be clearlyunderstood, by the action of the coned portion 6 of the screw, whichperformsthe functions of a wedge. \Vhen properly set or adjusted, thecutters are firmly fixed by screwing up the nut H.

Figs. 5 and 6 illustrate the application of my invention to ordinaryboringbars, Fig. 6 being a sectional view, and Fig. 5 a plan. In thisconstruction the collar B and male screw O are formed on a sleeve, J,which slips snugly over the bar, and is held in place by means of keysor pins M, or some other equivalent device. The bar must have across-slot to receive the cutters, and a hole to receive the screw I.The sleeve J only is shown in section in Fig. 6.

Figs. 7 and 8 illustrate a modification in which two projecting parts, aand b, on the cutters D and E, respectively, take over the v loosecollar G, and the latter is provided with two like cams, c and (Z,which, when said collar is. turned, take under the projections to and band drive out the cutters. This device is an equivalent of the screw I.By loosening nut H the collar Gmay be turned until the cutters areproperly protruded, when. it can be clamped fast by the nut.

Fig. 9 is a sectional view illustrating another modification, in which aconical nut, K, is made to displace the fixed collar B. This nut takesunder beveled projections a b on the cutters and drives them outward.The nut K is designed to take the place of the screw I and the cams c d.

I am aware that it is not new in reamers and metal-boring tools toarrange the cutters so that they may be adjusted radially for boringholes of greater or less diameter, and I am also aware that conicalscrews have been e1nployed for expanding the same. Therefore I make noclaim to these features.

Having thus described my invention, I claim 7 1. The combination, withthe boring-bar provided with a slot or mortise to receive the cutters, afixed collar, B, having a recess in its 2. The combination, with theboring -bar In witness whereof I have hereunto signed IO provided with aslot or mortise to receive the my name in the. presence of twosubscribing cutters, :1 fixed collar, B, having a recess in itsWitnesses.

face to receive the lateral edges of the cutters, JOSIAH VADE. a loosecollar, G, recessed similar to collar Witnesses:

B, and a nut, H, and male screw 0, of the \V. \VHITMAN,

cutters 1) and E, and the screw I, provided U. S. 0. Agent.

with a coned part, c, all arranged to operate A. B. CROSSLEY,

substantially as set forth. Patent Ayenf, H ulzfaw.

